Lines can be split up using the \ backslash. This can be useful in single-line macro definitions, or to neaten the code up in other ways.
in a,($DC) bit 2,a \ jr nz,{+} \ inc (ix+0) \ + bit 3,a \ jr nz,{+} \ dec (ix+0) \ + bit 0,a \ jr nz,{+} \ inc (ix+1) \ + bit 1,a \ jr nz,{+} \ dec (ix+1) \ +